CVE Catalog

CVE-2026-105789

MediumCVSS 5.4
Published: Updated: Translated: NVD NIST

Summary

In Microsoft UFO's execute_command tool (linux_mcp_server.py), sort and uniq are treated as read-only commands even though their options allow file output. An authenticated caller can use sort -o or the optional second uniq operand to create or overwrite files writable by the UFO server process without shell metacharacters. The issue is fixed in version 3.0.9.

Risk Assessment

Configuration or other writable data may be corrupted, disrupting the service. The demonstrated primitive does not directly disclose files or achieve arbitrary code execution.

Recommendation

Upgrade Microsoft UFO to version 3.0.9 or later. Restrict the UFO server process permissions to the minimum required.

Other vulnerabilities in Microsoft UFO

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Original NVD description (English source)

Microsoft UFO is an open-source framework for intelligent automation across devices and platforms. Prior to 3.0.9, the execute_command tool in ufo/client/mcp/http_servers/linux_mcp_server.py treats sort and uniq as read-only commands while the free-form command parameter can select their file-output forms. An authenticated caller can use sort -o or the optional second uniq operand to create or overwrite files writable by the UFO server process without shell metacharacters, because the allowed binary opens the destination itself and the argument policy does not reject the operation. This can corrupt configuration or other writable data and disrupt the service, but the demonstrated primitive does not directly disclose files or establish arbitrary code execution. This issue is fixed in version 3.0.9.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS